Microsoft-account app for Windows 10 mobile?

I decided to change our work phones from Android to Windows, but in the progress I can't seem to find the Microsoft app called Microsoft-Account app in the windows store. its quite handy for me as administrator. Anyone know if the app just got another name in windows store, or just not ported to their own system?
Worst case scenario is ofc that its not ported, for me as user, but its horrible for MS not to port their own apps to their own systems, its like telling the world, we dont belive in the system aswell..